320441434021 has 4 divisors (see below), whose sum is σ = 321573736192. Its totient is φ = 319309131852.

The previous prime is 320441433973. The next prime is 320441434031. The reversal of 320441434021 is 120434144023.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120434144023 = 96953 ⋅1242191.

It is a cyclic number.

It is not a de Polignac number, because 320441434021 - 2⁹ = 320441433509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320441434031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 566150661 + ... + 566151226.

It is an arithmetic number, because the mean of its divisors is an integer number (80393434048).

Almost surely, 2^320441434021 is an apocalyptic number.

It is an amenable number.

320441434021 is a deficient number, since it is larger than the sum of its proper divisors (1132302171).

320441434021 is a wasteful number, since it uses less digits than its factorization.

320441434021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132302170.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 320441434021 its reverse (120434144023), we get a palindrome (440875578044).

The spelling of 320441434021 in words is "three hundred twenty billion, four hundred forty-one million, four hundred thirty-four thousand, twenty-one".